CN206237419U - A kind of optical chaos synchronization system of long-range star-like laser network - Google Patents
A kind of optical chaos synchronization system of long-range star-like laser network Download PDFInfo
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Abstract
A kind of optical chaos synchronization system of long-range star-like laser network of the utility model includes：Centroid laser and some edge node lasers；Wherein, the optical signal that the first semiconductor laser sends is injected into many injection modules after sequentially passing through circulator, the first photo-coupler, the first Polarization Controller, the first optoisolator；First variable attenuator is connected between the first Polarization Controller and optical circulator to adjust the intensity of optical signal；Optical signal is divided into several pieces by many injection modules, and a recombined optical signal is synthesized after the fiber optic tap of each section optical signal inflow Length discrepancy；Recombined optical signal after the 4th photo-coupler, erbium-doped fiber amplifier, the 5th photo-coupler in being injected into multiple edge node lasers.By new many injection modules, in the case of long range, the height not only realized between edge node laser is synchronous, while also making the incidence coefficient between Centroid laser and edge node laser be reduced to 0.18.
Description
Technical field
The utility model is related to semiconductor laser field, and in particular to a kind of optical chaos synchronization of long-range star-like laser network
System.
Background technology
The incident information security issue of era development is in an endless stream, and nearly two during the last ten years, and people are logical to chaotic secret
Letter has carried out substantial amounts of research.Due to the aperiodicity of chaotic signal, noise like, continuous wide band frequency spectrum and quick to primary condition
The particular features such as perception, constitute the natural disguise of chaotic signal, and it turns into good communications carrier, accordingly chaotic signal institute
The information of carrying would become hard to be trapped, so that the safe and secret transmission of guarantee information.Semiconductor laser produce optical chaos by
In its high bandwidth, high complexity and the good characteristic such as it is readily available, in recent years as a topic for hot topic.Its application is non-
Often extensively, in secret communication, radar, physical random number generation, time domain reflection technology, even information processing etc. field has
It is related to.Be important to be mentioned that in secret communication field, semiconductor laser produce optical chaos have natural high modulation bandwidth with
And the long range low-loss transmission characteristic of optical fiber so that laser chaos secret communication is provided with good high speed information bearing capacity
With can long-distance transmissions characteristic, with important research and application value.Synchronization between chaos semiconductor laser is to realize
Secret communication and the necessary condition of secure key distribution.
In recent years, star-like laser network has attracted many concerns, in this network, multiple edge node lasers with
One Centroid laser link, Centroid laser is fed back by light and produces optical chaos signal and be input to each edge
In node laser.Chaotic Synchronous between star-like laser network node have inspired many injection communication plan and advanced safety
The proposition of key distribution network.Zamora-Munt et al. have studied in star-like laser network multiple edge node lasers it
Between zero propagation synchronization.Bourmpos et al. have studied edge node laser and Centroid laser with asymmetric coupling
The synchronization parameter sensitiveness of the Star Network of device.And it is nearest, someone theoretically have studied with the star-like of the time delay such as not
The synchronization mechanism of laser network.Greece Argyris et al. realizes edge section in star-like semiconductor laser network by experiment
High-quality Chaotic Synchronous between point.These researchs can all be classified as injects grinding for star-like semiconductor laser network for single
Study carefully, so-called single injection is that the optical chaos that Centroid laser is produced is directly injected into corresponding edge node laser by coupling
Device.The above-mentioned application being fruitful for star-like semiconductor laser network in reality is all of great importance.But if considering
To reality, the high-quality between edge node laser is synchronously desirable, while edge node laser and centromere
Low incidence coefficient between dot laser is also what is needed.The former be edge node laser between with safety be oriented to should
With there is provided safety assurance, the latter can ensure that the security of system.For remote semiconductor laser network, work as Centroid
Output it is highly similar to the output of edge node laser when, the optical fiber link of the long range between them is provided for listener-in
One feasible attack approach.
However, in most of single channel light injection Star Network, between edge node laser and Centroid laser
Incidence coefficient it is all very high, generally 0.7 or so.Therefore, based on above-mentioned consideration, explore a new paragon to reduce edge section
Incidence coefficient between dot laser and Centroid laser is necessary.
The content of the invention
To solve between edge node laser and Centroid laser in existing single channel light injection Star Network
Incidence coefficient problem very high, the utility model proposes a kind of optical chaos synchronization system of long-range star-like laser network.
The utility model proposes a kind of long-range star-like laser network optical chaos synchronization system, it is characterised in that including：
Centroid laser, wherein, the Centroid laser include the first semiconductor laser, optical circulator,
First photo-coupler, the first Polarization Controller, the first variable attenuator, the first optoisolator, many injection modules, the 4th optical coupling
Device, erbium-doped fiber amplifier and the 5th photo-coupler；
Some edge node lasers；
Wherein, the optical signal that first semiconductor laser sends sequentially pass through the circulator, the first photo-coupler,
Many injection modules are injected into after first Polarization Controller, the first optoisolator；First variable attenuator is connected to institute
State between the first Polarization Controller and the optical circulator to adjust the intensity of the optical signal；Many injection modules will be described
Optical signal is divided into several pieces, and a recombined optical signal is synthesized after the fiber optic tap of each section optical signal inflow Length discrepancy；
The recombined optical signal is described more by being injected into after the 4th photo-coupler, erbium-doped fiber amplifier, the 5th photo-coupler
In individual edge node laser.
Further, also it is connected with the 4th photo-coupler including the second optoisolator, by the recombined optical signal
Derivation carries out the measurement of chaotic signal.
Further, second optoisolator by connect light power meter, spectroanalysis instrument, electron spectrum analyzer and
Wideband digital oscillograph carries out the measurement of chaotic signal.
Further, many injection modules include the second photo-coupler, some second Polarization Controllers and the 3rd optocoupler
Clutch；The optical signal flows into Length discrepancy by being divided into several pieces, each section optical signal after second photo-coupler
After fiber optic tap, respectively through the multiple second Polarization Controller, a restructuring is synthesized by the 3rd photo-coupler
Optical signal.
Further, the number of the multiple second Polarization Controller is 3.
Further, the edge node laser includes the 3rd Polarization Controller, the second variable attenuator, the 6th optocoupler
Clutch and the second semiconductor laser；The recombined optical signal is by the 3rd Polarization Controller, the second variable attenuator,
Six photo-couplers are injected into second semiconductor laser.
Further, the 6th photo-coupler is 10:90 photo-coupler.
Further, first semiconductor laser is low-noise semiconductor laser.
Further, the number of the multiple edge node laser is 2.
Further, first photo-coupler is 50:50 photo-coupler.
During the beneficial effects of the utility model are the optical chaos synchronization system of long-range star-like laser network, by new many notes
Enter module to realize mixing injection from Centroid laser to the multichannel light of edge node laser, in the case of long range, no
The height only realized between edge node laser is synchronous, while also making between Centroid laser and edge node laser
Incidence coefficient be reduced to 0.18, distance above have good ductility.And can be widely applied to other topological type nets
In network, such as in grid type, ring-like and other mixed types topological structure, can also effectively support various requirement high safety
Using such as multi-user's chaotic communication network and safe key distribution network.
Brief description of the drawings
Fig. 1 is the system architecture of the implementation method of optical chaos synchronization system one of the long-range star-like laser network of the utility model
Figure.
Fig. 2 be 10 kms Optical Fiber Transmission distance under each edge node laser optical chaos time domain waveform and spectrogram.
Fig. 3 is CC of any limit of the optical chaos synchronization system of long-range star-like laser network between node lasermax
Evolution curve under different injecting powers and different frequency off resonance.
Fig. 4 is the optical chaos synchronization system of the long-range star-like laser network of the utility model in the light that transmission range is 80 kms
The design sketch of chaotic synchronization communication.
Specific embodiment
The utility model is realized from Centroid laser to many of edge node laser by new many injection modules
Road light mixing injection, in the case of long range, the height not only realized between edge node laser is synchronous, while also making center
Incidence coefficient between node laser and edge node laser is reduced to 0.18, above has good ductility in distance.
Fig. 1 is the system architecture of the implementation method of optical chaos synchronization system 1 one of the long-range star-like laser network of the utility model
Figure.In figure, 1 is the optical chaos synchronization system of long-range star-like laser network, node laser centered on 2, and 3 is edge node laser
Device, 12 is the first semiconductor laser, and 14 is optical circulator, and 16 is the first photo-coupler, and 18 is the first Polarization Controller, and 20 are
First variable attenuator, 22 be the first optoisolator, 24 be many injection modules, 26 be the 4th photo-coupler, 28 be the second light every
From device, 30 is erbium-doped fiber amplifier, and 32 is the 5th photo-coupler, and 34 is the 3rd resonant controller, and 36 is the second variable attenuation
Device, 38 is the 6th photo-coupler, and 40 is the second semiconductor laser.
Fig. 1 is referred to, the implementation method of optical chaos synchronization system one for being the utility model long-range star-like laser network is
System structure chart.In the present embodiment, the optical chaos synchronization system 1 of long-range star-like laser network includes：Centroid laser 2
With some edge node lasers 3.Centroid laser 2 includes the first semiconductor laser 12, optical circulator 14, the first light
Coupler 16, the first Polarization Controller 18, the first variable attenuator 20, the first optoisolator 22, many injection modules 24, the 4th light
Coupler 26, the photo-coupler 32 of erbium-doped fiber amplifier 30 and the 5th.
It is inclined that the optical signal that first semiconductor laser 12 sends sequentially passes through circulator 14, the first photo-coupler 16, first
Shake and be injected into many injection modules 24 after controller 18, the first optoisolator 22.First variable attenuator 20 is connected to the first polarization
Adjusting the intensity of optical signal between controller 18 and optical circulator 14.Optical signal is divided into several pieces by many injection modules 24,
A recombined optical signal is synthesized after the fiber optic tap of each section optical signal inflow Length discrepancy.Recombined optical signal is by the 4th light
It is injected into after coupler 26, erbium-doped fiber amplifier 30, the 5th photo-coupler 32 in multiple edge node lasers 3.
In the present embodiment, the optical chaos synchronization system 1 of long-range star-like laser network also includes the second optoisolator 28,
It is connected with the 4th photo-coupler 26, recombined optical signal is derived carries out the measurement of chaotic signal.In the present embodiment, the second light
Isolator 28 carries out chaos by connecting light power meter, spectroanalysis instrument, electron spectrum analyzer and wideband digital oscillograph
The measurement of signal.
Many injection modules 24 include the second photo-coupler 240, the photo-coupler of some second Polarization Controllers 242 and the 3rd
244, optical signal flows into the optical fiber point of Length discrepancy by being divided into several pieces, each section optical signal after the second photo-coupler 240
Zhi Hou, respectively through multiple second Polarization Controllers 242, a recombined optical signal is synthesized by the 3rd photo-coupler 244.
Each edge node laser 3 includes the 3rd Polarization Controller 34, the second variable attenuator 36, the 6th photo-coupler
38 and second semiconductor laser 40, recombined optical signal is by the 3rd Polarization Controller 34, the second variable attenuator 36, the 6th light
Coupler is injected in the 38 to the second semiconductor laser 40.6th photo-coupler 38 is 10:90 photo-coupler, the first optical coupling
Device is 50:50 photo-coupler.
In the present embodiment, the first semiconductor laser 12 is low-noise semiconductor laser.Further, edge node
The number of laser 3 is 2.Further, the number of the second Polarization Controller 242 is 3.
In one embodiment, each edge node laser 3 passes through tens kms single-mode fiber and Centroid
Laser 2 is connected.In the part of Centroid laser 2, the first semiconductor laser 12 is tentatively given birth to by an optical signal feedback
Into chaos seed signal, m parts is divided into through excessive injection module 24, each of which part signal flows into the optical fiber point of Length discrepancy
Branch, finally synthesizes a new recombined optical signal in the exit of many injection modules.It is defeated as the part of Centroid laser 2
The recombined optical signal for going out by after the amplification of erbium-doped fiber amplifier 30 1:5th photo-coupler 32 of n is divided into n parts under acting on
N edge node laser 3 of injection simultaneously.Many injection modules 24 be realize between edge node laser 3 high-quality it is synchronous with
And the notable key point of low association between Centroid laser 2 and edge node laser 3.The He of first variable attenuator 20
First Polarization Controller 18 is used for adjusting the injection intensity and polarization level of the light from Centroid laser 2.First and
Two optoisolators are to prevent unnecessary reflection interference.The biased electrical of Centroid laser 2, edge node laser 3
Stream is fixed to 22mA, 11.38mA respectively.From Centroid laser 2 to the injecting power κ of each edge node laser 3
Preliminary to be set to 170 μ W, Centroid laser 2, the laser temperature of edge node laser 3 are stablized at 21.02 DEG C respectively,
24.68℃.Therefore, useful frequency detuning Δ f is produced between Centroid laser and edge node laserH-S=
4GHz。
Refer to Fig. 2, be 10 kms Optical Fiber Transmission distance under each edge node laser 3 optical chaos time domain waveform and
Spectrogram.Fig. 2 includes a1-a3, b1-b3 and c1-c3.A1, b1 and c1 of Fig. 2 be respectively an edge node laser 3 when
Domain waveform, spectrum and radio-frequency spectrum；A2, b2 and c2 of Fig. 2 be respectively another side along the time domain waveform of node laser 3, spectrum and
Radio-frequency spectrum；A3, b3 and c3 of Fig. 2 is respectively time domain waveform, spectrum and the radio-frequency spectrum of Centroid laser 2.First, from Fig. 2
A1, a2, a3 can be seen that edge node laser 3 it is quite similar with the time domain waveform of edge node laser 2 and they with
The time domain waveform of Centroid laser 2 has very big difference.Observation edge node laser 3 is with another side along node laser
The frequency spectrum (see (b1-b3, the c1-c3) of Fig. 2) of device 3, it is possible to find their frequency spectrum is also extremely similar, and with Centroid laser
Compared to being but very different, particularly in low frequency part, the power (c3 of Fig. 2) of Centroid laser 2 shows the frequency spectrum of device
Write enhancing.In view of time-domain and the relation of frequency domain, the power of the c3 low-frequency ranges of Fig. 2 strengthens time domain in the a3 for having corresponded to Fig. 2
Waveform fluctuates widely.Therefore, the time domain waveform of Centroid laser 2 is with the time domain waveform difference of edge node laser 3 very
Greatly.This shows in many injection Star Networks, while realizing the high-quality synchronization between edge node laser 3 and centromere
Low association between dot laser 2 and edge node laser 3.
Fig. 3 is referred to, is any limit of optical chaos synchronization system of long-range star-like laser network between node laser 3
CCmaxEvolution curve under different injecting powers and different frequency off resonance.Be can be seen that from these curves real to understand
Specified conditions needed for now injecting the high-quality Chaotic Synchronous of Star Networks more, Fig. 3 gives (left in different injecting power κ
Row) and different frequency off resonance Δ fH-SCoefficient correlation maximum (CC in lower network between arbitrary nodemax) evolution diagram it is (right
Row).The first row is the evolution curve under many injections, and the second row is the evolution curve under single injection.Square represents that edge node swashs
The CC of light device 3 and another side between node laser 3maxValue.Rhombus represents Centroid laser 2 and edge node laser
CC between device 3max；The CC of triangular representation Centroid laser 2 and another side between node laser 2max.First,
When many light inject, the a1 of Fig. 3 indicates CCmaxIncrease along with the growth of injecting power.I ' in the a1 of Fig. 3
In region, edge node laser 3 and net synchronization capability of the another side between node laser 3 greatly improve (20 μ w<κ<150μ
W), the CC and between Centroid laser 2 and edge node laser 3maxIt is simply slow to increase, in II ' regions, edge section
The CC of net synchronization capability between dot laser 3 more than 0.9 between Centroid laser 2 and edge node laser 3maxBut
Less than 0.2.In addition be can also be seen that from the b1 of Fig. 3 when frequency detuning is in the range of -20GHz to 20GHz, centromere
CC between dot laser 2 and edge node laser 3maxOne is constantly in than relatively low level (less than 0.2), and edge
Net synchronization capability between node laser 3 maintains a high level (- 12GHz more than 0.9<ΔfH-S<5GHz).Compared to it
Under, the a2 of Fig. 3, b2 is given under the condition of work similar to many injection Star Networks, monochromatic light injection Star Network interior joint
Between CCmaxDevelop.From the a2 of Fig. 3, b2 can be seen that the CC between Centroid laser and edge node lasermax
As the increase of injecting power or frequency detuning is increased rapidly to 0.6, this illustrates that monochromatic light injects star-like semiconductor laser net
Strong correlation in network between Centroid laser 2 and edge node laser 3.In a word, in injecting power and frequency very wide
In the range of rate off resonance, injecting Star Network can keep good Chaotic Synchronous more, while realizing Centroid laser 2 and side
Low association along between node laser 3.
Fig. 4 is referred to, the optical chaos synchronization system 1 for being the long-range star-like laser network of the utility model is 80 in transmission range
The design sketch of the optical chaos synchronous communication of km.In order to prove that the stability under many injection Star Networks long range transmission is surveyed
Examination.The a1-a3 of Fig. 4:Respectively edge node laser 3, another side along node laser 3 and Centroid laser 2 when
Domain waveform, the b1-b3 of Fig. 4 is respectively between edge node laser 3, edge node laser 3 and Centroid laser 2
Between, related figure of the another side between node laser 3 and Centroid laser 2.The a1 of Fig. 4, a2 present edge section
High consistency in dot laser 3 and the another time domain waveform of edge node laser 3.CC may certify that by the b1 of Fig. 4max≈
0.81, and the time domain beamformer (a3 of Fig. 4) of Centroid laser 2 has with the time domain beamformer of edge node laser 3
Very big difference.Correspondingly, the CC between Centroid laser 2 and edge node laser 3maxValue is substantially very low (respectively
0.16,0.18) if it is considered that being transmitted more than the long range of 100 kms, the accumulation of the factor such as nonlinear fiber and dispersion can be turned round
Bent signal, a certain degree of influence is caused on the net synchronization capability of chaotic communication.Therefore various advanced dispersion compensation devices are introduced,
For example：Dispersion compensating fiber (DCF), fiber grating (FBG) etc., make to realize that transmission range is star-like more than many injections of 100 kms
Network becomes possibility.
The specific implementation of the optical chaos synchronization system 1 of long-range star-like laser network of the present utility model, may relate to make
With software, but the software for being used is the most frequently used software of those skilled in the art, also, not present patent application right will
Seek scope of the claimed.
During the beneficial effects of the utility model are the optical chaos synchronization system 1 of long-range star-like laser network, by new many
Injection module 24 is realized mixing injection from Centroid laser 2 to the multichannel light of edge node laser 3, in long range situation
Under, the height not only realized between edge node laser 3 is synchronous, while also swashing Centroid laser 2 and edge node
Incidence coefficient between light device 3 is reduced to 0.18, above has good ductility in distance.And can be widely applied to others
In topological type network, such as in grid type, ring-like and other mixed types topological structure, can also effectively support various requirement
The application of high safety, such as multi-user's chaotic communication network and safe key distribution network.
Preferred embodiment of the present utility model is these are only, the utility model is not limited to, for this area
Technical staff for, it is all it is of the present utility model spirit and principle within, any modification, equivalent substitution and improvements made etc.,
Should be included within protection domain of the present utility model.
Claims (10)
1. a kind of optical chaos synchronization system of long-range star-like laser network, it is characterised in that including：
Centroid laser, wherein, the Centroid laser includes the first semiconductor laser, optical circulator, first
Photo-coupler, the first Polarization Controller, the first variable attenuator, the first optoisolator, many injection modules, the 4th photo-coupler,
Erbium-doped fiber amplifier and the 5th photo-coupler；
Some edge node lasers；
Wherein, the optical signal that first semiconductor laser sends sequentially passes through the optical circulator, the first photo-coupler,
Many injection modules are injected into after one Polarization Controller, the first optoisolator；First variable attenuator is connected to described
Adjusting the intensity of the optical signal between first Polarization Controller and the optical circulator；Many injection modules are by the light
Signal is divided into several pieces, and a recombined optical signal is synthesized after the fiber optic tap of each section optical signal inflow Length discrepancy；Institute
State recombined optical signal the multiple by being injected into after the 4th photo-coupler, erbium-doped fiber amplifier, the 5th photo-coupler
In edge node laser.
2. the optical chaos synchronization system of star-like laser network as claimed in claim 1 long-range, it is characterised in that also including second
Optoisolator, is connected with the 4th photo-coupler, and the recombined optical signal is derived carries out the measurement of chaotic signal.
3. the optical chaos synchronization system of star-like laser network as claimed in claim 2 long-range, it is characterised in that second light
Isolator carries out chaos letter by connecting light power meter, spectroanalysis instrument, electron spectrum analyzer and wideband digital oscillograph
Number measurement.
4. the optical chaos synchronization system of star-like laser network as claimed in claim 1 long-range, it is characterised in that many injections
Module includes the second photo-coupler, some second Polarization Controllers and the 3rd photo-coupler；The optical signal is by described second
Several pieces are divided into after photo-coupler, after each section optical signal flows into the fiber optic tap of Length discrepancy, respectively through the multiple
Second Polarization Controller, a recombined optical signal is synthesized by the 3rd photo-coupler.
5. the optical chaos synchronization system of star-like laser network as claimed in claim 4 long-range, it is characterised in that the multiple the
The number of two Polarization Controllers is 3.
6. the optical chaos synchronization system of star-like laser network as claimed in claim 1 long-range, it is characterised in that the edge section
Dot laser includes the 3rd Polarization Controller, the second variable attenuator, the 6th photo-coupler and the second semiconductor laser；It is described
Recombined optical signal is injected into described the second half by the 3rd Polarization Controller, the second variable attenuator, the 6th photo-coupler
In conductor laser.
7. the optical chaos synchronization system of star-like laser network as claimed in claim 6 long-range, it is characterised in that the described 6th
Photo-coupler is 10:90 photo-coupler.
8. the optical chaos synchronization system of star-like laser network as claimed in claim 1 long-range, it is characterised in that described the first half
Conductor laser is low-noise semiconductor laser.
9. the optical chaos synchronization system of star-like laser network as claimed in claim 1 long-range, it is characterised in that the multiple side
It is 2 along the number of node laser.
10. the optical chaos synchronization system of star-like laser network as claimed in claim 1 long-range, it is characterised in that described first
Photo-coupler is 50:50 photo-coupler.
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| CN112260824A (en) * | 2020-09-18 | 2021-01-22 | 太原理工大学 | Gbps physical key safety distribution system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112260824A (en) * | 2020-09-18 | 2021-01-22 | 太原理工大学 | Gbps physical key safety distribution system |
| CN112260824B (en) * | 2020-09-18 | 2022-05-13 | 太原理工大学 | Gbps physical key safety distribution system |
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